"Titanic" film director James Cameron completed the world's first solo dive to the bottom of the Pacific Ocean's Mariana Trench in a specially-designed submarine. (Video: Reuters/Photo: AP)

This transcript has been automatically generated and may not be 100% accurate.

... Titanic director James Cameron returns from the depths of the Pacific Ocean ... he's completed the world's first solo dive to the deepest known point on earth ... after descending to the bottom of the Mariana trench southwest of lawn and a specially designed submarine ... Cameron's sci fi returned to the surface around noon local time ... the filmmaker has arrived at the underwater sites known as Challenger deep shortly before eight am ... reaching a depth of thirty five thousand seven hundred and fifty six feet ... or roughly seven miles ... he spent about three hours at the bottom collecting research samples from marine biology and geology ... Cameron is the third person ever to reach the lowest point in the Mariana trench the the the the the ... the ... the ... mood ... and thinking ... a long way down ... when you know those legs and it didn't help that is low ... billed as the years go ... Billy ... you know ... the wind and ... waves ... the expedition was a two week project like camera National Geographic and watchmakers Rolex ... it's been dubbed deep sea challenge ... well he is perhaps better known as the director of such films as Titanic app that aren't aliens ... Cameron is no stranger to underwater exploration ... for Titanic YouTube twelve dives to the theme shipwreck in the North Atlantic ... he has since led another six expeditions ... Travis Brecher workers